#!/usr/bin/env python
# -*- coding: utf-8 -*-

# @Time     :2022/03/01
# @Author   :Changshu
# @File     :Exercise3.py

# 集合测试
# 3. 无重复字符的最长子串
if __name__ == '__main__':
	l=[0,1,2,3,4,5,6,7]
	l.append(8)
	print(l)
	l.pop(0)
	print(l)
